I just bought an LN46D630 over the weekend and would like to report my findings and ask a couple of questions.
This is my first Samsung and is the latest member of a growing list of sets I've owned in the past year and a half in an attempt to find a satisfactory set for my money. I have already owned and returned:
two different Sony KDL-52Z5100s (corner flashlighting, banding and clouding)
a Sony KDL-52NX800 (corner flashlighting, banding and terrible clouding)
a Vizio XVT553SV (disruptive side effects of local dimming)
a Vizio E470VL (corner/edge flashlighting and HORRIBLE black level)
So far the picture quality of the LN46D630 seems to be acceptable, and I have some new settings to try this weekend thanks to this thread. I see minor corner flashlighting and VERY minor banding and clouding. I'm also not a huge fan of the bronze colored strip in the bottom part of the bezel, although once it was sitting in my living room it was far less intrusive than i expected. I could live with all of these issues and see this being a keeper if the gaming lag wasn't so noticeable.
Even with Game mode on and with all extra processing and advanced features turned off I still notice input lag. I have a PS3 connected via HDMI and when i pull the trigger in SOCOM the bullet takes a noticeable split second to hit the wall and the sound of the shot comes as the bullet hits the wall, not as the controller vibrates. All of the previous sets I had before were fine in this respect right out of the box, even the Vizio E470VL.
I tried to at least fix the sound delay by connecting a set of amplified computer speakers and sub directly to the digital audio out and messing with the SPDIF audio delay in the Settings > General section and that didn't seem to do anything at all. I thought the manual said that would help but maybe I misunderstood. Either way it seems like the whole PS3 signal (audio and video) is a little off time and even though it is playable it will be a deal breaker for me if I cannot find a fix.
I have 90 days to return the set, so I'm wondering if anyone has any suggestions or if it seems likely that there may be a software update coming for this set to help with input lag.